On 25/06/2025 11:14, Luca Weiss wrote:
> As per the downstream devicetree for SM7635, add a register write for
> QCOM_USB_PHY_CFG_CTRL_1 as per the "eUSB2 HPG version 1.0.2 update".
>
> Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
> ---
> The downstream driver supports an arbitrary extra init sequence via
> qcom,param-override-seq.
>
> volcano-usb.dtsi has the following which is implemented in this patch:
>
> /* eUSB2 HPG version 1.0.2 update */
> qcom,param-override-seq =
> <0x00 0x58>;
> ---
> drivers/phy/phy-snps-eusb2.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/phy/phy-snps-eusb2.c b/drivers/phy/phy-snps-eusb2.c
> index e232b8b4d29100b8fee9e913e2124788af09f2aa..6122fc797c7fd3011936edc3ff4dafe6a58e6583 100644
> --- a/drivers/phy/phy-snps-eusb2.c
> +++ b/drivers/phy/phy-snps-eusb2.c
> @@ -420,6 +420,12 @@ static int qcom_snps_eusb2_hsphy_init(struct phy *p)
> /* set default parameters */
> qcom_eusb2_default_parameters(phy);
>
> + if (of_device_is_compatible(p->dev.of_node, "qcom,sm7635-snps-eusb2-phy")) {
> + /* eUSB2 HPG version 1.0.2 update */
> + writel_relaxed(0x0, phy->base + QCOM_USB_PHY_CFG_CTRL_1);
> + readl_relaxed(phy->base + QCOM_USB_PHY_CFG_CTRL_1);
> + }
> +
> snps_eusb2_hsphy_write_mask(phy->base, QCOM_USB_PHY_HS_PHY_CTRL2,
> USB2_SUSPEND_N_SEL | USB2_SUSPEND_N,
> USB2_SUSPEND_N_SEL | USB2_SUSPEND_N);
>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>